A child's word for a minor injury, bump, or mistake; a small blunder or silly error that causes embarrassment or minor harm.
Reduplication of 'boo' (a sound of distress or disapproval). The doubled form became associated with minor hurts through baby talk and children's language in the 20th century.
'Booboo' is pure onomatopoeia and reduplication—the word sounds like what it means, and repeating it twice makes it feel smaller and cuter. This is why kids love it!
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